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ALT0: Difference between revisions
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'''ALT0''' is scene slang for the [[Super FX]] state where both the [[ALT1]] and [[ALT2]] flags are clear. Many instructions restore the ALT0 state, including: | '''ALT0''' is scene slang for the [[Super FX]] state where both the [[ALT1]] and [[ALT2]] flags are clear. Many instructions restore the ALT0 state, including: | ||
* [[GSU/ADC|ADC]] R<sub>n</sub> | |||
* [[GSU/ADC|ADC]] #n | |||
* ADC R<sub>n</sub> | * [[ADD]] R<sub>n</sub> | ||
* ADC #n | * [[ADD]] #n | ||
* ADD R<sub>n</sub> | * [[GSU/AND|AND]] R<sub>n</sub> | ||
* ADD #n | * [[GSU/AND|AND]] #n | ||
* AND R<sub>n</sub> | * [[ASR]] | ||
* AND #n | |||
* ASR | |||
* [[BIC]] R<sub>n</sub> | * [[BIC]] R<sub>n</sub> | ||
* [[BIC]] #n | * [[BIC]] #n | ||
* [[CACHE]] | * [[CACHE]] | ||
* [[CMODE]] | * [[CMODE]] | ||
* CMP R<sub>n</sub> | * [[GSU/CMP|CMP]] R<sub>n</sub> | ||
* COLOR | * [[COLOR]] | ||
* DEC R<sub>n</sub> | * [[GSU/DEC|DEC]] R<sub>n</sub> | ||
* [[DIV2]] | * [[DIV2]] | ||
* [[FMULT]] | * [[FMULT]] | ||
| Line 26: | Line 24: | ||
* [[HIB]] | * [[HIB]] | ||
* [[IBT]] R<sub>n</sub>, #pp | * [[IBT]] R<sub>n</sub>, #pp | ||
* INC R<sub>n</sub> | * [[GSU/INC|INC]] R<sub>n</sub> | ||
* [[IWT]] R<sub>n</sub>, #xx | * [[IWT]] R<sub>n</sub>, #xx | ||
* JMP R<sub>n</sub> | * [[GSU/JMP|JMP]] R<sub>n</sub> | ||
* [[LDB]] (R<sub>m</sub>) | * [[LDB]] (R<sub>m</sub>) | ||
* [[LDW]] (R<sub>m</sub>) | * [[LDW]] (R<sub>m</sub>) | ||
* [[LEA]] | * [[LEA]] R<sub>n</sub>, xx | ||
* [[LINK]] #n | * [[LINK]] #n | ||
* [[LJMP]] R<sub>n</sub> | * [[LJMP]] R<sub>n</sub> | ||
* LM R<sub>n</sub>, (xx) | * [[GSU/LM|LM]] R<sub>n</sub>, (xx) | ||
* [[LMS]] R<sub>n</sub>, (yy) | * [[LMS]] R<sub>n</sub>, (yy) | ||
* [[LMULT]] | * [[LMULT]] | ||
* [[LOB]] | * [[LOB]] | ||
* [[LOOP]] | * [[LOOP]] | ||
* LSR | * [[GSU/LSR|LSR]] | ||
* [[MERGE]] | * [[MERGE]] | ||
* MOVE R<sub>n</sub>, R<sub>n</sub>' | * [[GSU/MOVE|MOVE]] R<sub>n</sub>, R<sub>n</sub>' | ||
* [[MOVES]] R<sub>n</sub>, R<sub>n</sub>' | * [[MOVES]] R<sub>n</sub>, R<sub>n</sub>' | ||
* [[MULT]] R<sub>n</sub> | * [[MULT]] R<sub>n</sub> | ||
* [[MULT]] #n | * [[MULT]] #n | ||
* NOP | * [[GSU/NOP|NOP]] | ||
* [[NOT]] | * [[NOT]] | ||
* [[OR]] R<sub>n</sub> | * [[OR]] R<sub>n</sub> | ||
* OR #n | * [[OR]] #n | ||
* [[PLOT]] | * [[PLOT]] | ||
* [[RAMB]] | * [[RAMB]] | ||
* ROL | * [[GSU/ROL|ROL]] | ||
* [[ROMB]] | * [[ROMB]] | ||
* ROR | * [[GSU/ROR|ROR]] | ||
* [[RPIX]] | * [[RPIX]] | ||
* SBC R<sub>n</sub> | * [[GSU/SBC|SBC]] R<sub>n</sub> | ||
* [[SBK]] | * [[SBK]] | ||
* [[SEX]] | * [[SEX]] | ||
* SM (xx), R<sub>n</sub> | * [[SM]] (xx), R<sub>n</sub> | ||
* [[SMS]] (yy), R<sub>n</sub> | * [[SMS]] (yy), R<sub>n</sub> | ||
* [[STB]] (R<sub>m</sub>) | * [[STB]] (R<sub>m</sub>) | ||
| Line 67: | Line 65: | ||
* [[SWAP]] | * [[SWAP]] | ||
* [[UMULT]] R<sub>n</sub> | * [[UMULT]] R<sub>n</sub> | ||
* and presumably UMULT #n too | * and presumably UMULT #n and XOR too | ||
=== See Also === | === See Also === | ||
* [[ALT3]] | * [[ALT3]] | ||
* [[Super_FX_Opcode_Matrices#ALT1_=_0,_ALT2_=_0]] | |||
* | |||
=== References === | === References === | ||
* ares source: https://github.com/ares-emulator/ares/blob/master/ares/component/processor/gsu/disassembler.cpp#L37 | * ares source: https://github.com/ares-emulator/ares/blob/master/ares/component/processor/gsu/disassembler.cpp#L37 | ||
* Table 2-4-2 on [https://archive.org/details/SNESDevManual/book2/page/n110 page 2-4-4 of Book II] of the official Super Nintendo development manual | |||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:Super FX]] | [[Category:Super FX]] | ||
[[Category:Scene Slang]] | [[Category:Scene Slang]] | ||
Latest revision as of 00:49, 22 July 2024
ALT0 is scene slang for the Super FX state where both the ALT1 and ALT2 flags are clear. Many instructions restore the ALT0 state, including:
- ADC Rn
- ADC #n
- ADD Rn
- ADD #n
- AND Rn
- AND #n
- ASR
- BIC Rn
- BIC #n
- CACHE
- CMODE
- CMP Rn
- COLOR
- DEC Rn
- DIV2
- FMULT
- GETB
- GETBH
- GETBL
- GETBS
- GETC
- HIB
- IBT Rn, #pp
- INC Rn
- IWT Rn, #xx
- JMP Rn
- LDB (Rm)
- LDW (Rm)
- LEA Rn, xx
- LINK #n
- LJMP Rn
- LM Rn, (xx)
- LMS Rn, (yy)
- LMULT
- LOB
- LOOP
- LSR
- MERGE
- MOVE Rn, Rn'
- MOVES Rn, Rn'
- MULT Rn
- MULT #n
- NOP
- NOT
- OR Rn
- OR #n
- PLOT
- RAMB
- ROL
- ROMB
- ROR
- RPIX
- SBC Rn
- SBK
- SEX
- SM (xx), Rn
- SMS (yy), Rn
- STB (Rm)
- STOP
- STW (Rm)
- SUB Rn
- SUB #n
- SWAP
- UMULT Rn
- and presumably UMULT #n and XOR too
See Also
References
- ares source: https://github.com/ares-emulator/ares/blob/master/ares/component/processor/gsu/disassembler.cpp#L37
- Table 2-4-2 on page 2-4-4 of Book II of the official Super Nintendo development manual